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| From: | Bhaskar |
| Subject: | Dereferencing a null pointer! |
| Date: | Fri, 1 Dec 2000 18:02:51 -0800 |
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Hi,
I'm using gcc to compile my C
programs on Solaris.Basically i'm porting a product from SVR4 to Solaris.It
seems SVR4 UNIX allows dereferencing of null pointers(sic!) and the programmers
of my product have taken advantage of this fact.
Look at the following piece of code
:
char *str=NULL;
...
...
...
printf("%s",str);
if str is not allocated any memory before the
printf it still points to null and when i execute code like this on Solaris
7.0 i get Segmentation fault and core dump.But the same thing works fine on
SVR4!(It gives the appearance to the programmer that data at address 0
is '\0' (integer 0)).
Changing the code is difficult as the logic is
also built around this capability.
Please let me know if there are any gcc
flags or patches or OS patches that i can install that will allow dereferencing
of null pointers!
Thank You,
Bhaskar.
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